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     Drawing Pentagon in Excel
and find about Phi (Golden Ratio)    

- May 3, 2008 -

     Visit the playground in Excel to try and find about
pentagons and Phi     

- June 7, 2008 -

"The set of all points whose distances from two fixed points are in a constant ratio
(Durell 1928, Ogilvy 1990)."
(Apollonius Circle -- from Wolfram MathWorld)

Then how about constant ratio 1:phi? And the lines tangent to the circle? 
Excel is used to explore these at the playground ("PHI Park").

- July 19, 2008 -

 Excel Trigonometry with Golden Triangle,
Rectangle and Pentagon  

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